150 lines
3.3 KiB
Ruby
150 lines
3.3 KiB
Ruby
module Mutant
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class Mutator
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class Node
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# Mutator for Rubinius::AST::If nodes
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class IfStatement < self
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handle(Rubinius::AST::If)
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private
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# Emit mutations on Rubinius::AST::If nodes
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#
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# @return [undefined]
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#
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# @api private
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#
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def dispatch
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emit_condition_mutants
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emit_if_branch_mutants
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emit_else_branch_mutants
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emit_inverted_condition
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emit_deleted_if_branch
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emit_deleted_else_branch
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end
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# Emit inverted condition
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#
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# Especially the same like swap branches but more universal as it also
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# covers the case there is no else branch
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#
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# @return [undefined]
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#
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# @api private
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#
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def emit_inverted_condition
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emit_self(invert(condition), if_branch, else_branch)
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end
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# Emit deleted else branch
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#
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# @return [undefined]
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#
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# @api private
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#
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def emit_deleted_else_branch
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emit_self(condition, if_branch, nil)
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end
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# Emit deleted if branch
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#
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# @return [undefined]
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#
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# @api private
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#
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def emit_deleted_if_branch
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body = else_branch
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return unless body
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emit_self(condition, else_branch, nil)
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end
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# Return ast that returns inverted boolean value
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#
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# @param [Rubinius::Node::AST] node
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#
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# @return [Rubinius::Node::AST]
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#
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# @api private
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#
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# Using :'!' instead of :! since syntax highlighting in vim does not
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# capture literal symbol.
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#
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def invert(node)
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if Helper.on_18?
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return new(Rubinius::AST::Not, node)
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end
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new_send(node,:'!')
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end
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# Emit mutants of condition
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#
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# @return [undefined]
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#
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# @api private
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#
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def emit_condition_mutants
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Mutator.each(condition) do |mutant|
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emit_self(mutant, if_branch, else_branch)
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end
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end
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# Emit if body mutations
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#
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# @return [undefined]
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#
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# @api private
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#
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def emit_if_branch_mutants
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Mutator.each(if_branch) do |mutant|
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emit_self(condition, mutant, else_branch)
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end
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end
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# Emit else body mutations
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#
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# @return [undefined]
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#
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# @api private
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#
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def emit_else_branch_mutants
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body = else_branch
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return unless body
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Mutator.each(body) do |mutant|
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emit_self(condition, if_branch, mutant)
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end
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end
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# Return if_branch of node
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#
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# @return [Rubinius::AST::Node]
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#
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# @api private
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#
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def if_branch
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node.body
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end
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# Return condition of node
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#
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# @return [Rubinius::AST::Node]
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#
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# @api private
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#
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def condition
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node.condition
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end
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# Return else body of node
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#
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# @return [Rubinius::AST::Node]
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#
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# @api private
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#
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def else_branch
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node.else
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end
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end
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end
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end
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end
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